Wireless battery management architecture

Abstract

Disclosed in the present application are a wireless battery management architecture, comprising: a management and control module, a first wireless module, a second wireless module, a first antenna, a second antenna and a register, wherein the first antenna and the second antenna are made of different materials, the register stores a first real-time RSSI value of the first antenna and a second real-time RSSI value of the second antenna, and the management and control module switches the working states of the first antenna and the second antenna in real time on the basis of the first real-time RSSI value and the second real-time RSSI value.

Description

A wireless battery management architecture

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Chinese Patent Application No. 202311530705.X ​​filed on November 16, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of battery pack management, and in particular to a wireless battery management architecture. Background Art

[0004] Battery-powered devices like electric vehicles and power tools often require a battery management system (BMS) to ensure battery safety and stability. Therefore, ensuring the BMS operates stably and safely becomes a primary design consideration.

[0005] Existing wireless battery management systems typically use a single antenna for signal transmission. However, in certain situations, this single antenna may malfunction or be subject to interference, resulting in communication interruption or degradation. To address this issue, redundant antennas have been proposed. However, existing redundant antenna designs still have drawbacks, such as common-negative interference and insufficient robustness, which can significantly disrupt the stable operation of the BMS.

[0006] Application Contents

[0007] The embodiments of the present application provide a wireless battery management architecture, which designs a redundant antenna communication structure to address the defects of a single antenna communication structure and ensure the stability of BMS operation.

[0008] To achieve the above objectives, an embodiment of the present application provides a wireless battery management architecture, including:

[0009] A control module, a first wireless module, a second wireless module, a first antenna, a second antenna, and a register; the first antenna and the second antenna are made of different materials;

[0010] The control module is connected to the first wireless module and the second wireless module respectively; the first antenna is connected to the first wireless module as a communication module of the first wireless module, and the second antenna is connected to the second wireless module as a communication module of the second wireless module;

[0011] The register is used to store a first real-time RSSI value of the first antenna and a second real-time RSSI value of the second antenna;

[0012] The management and control module is used to switch the working states of the first antenna and the second antenna in real time according to the first real-time RSSI value and the second real-time RSSI value.

[0013] In a possible implementation, the first wireless module is configured to calculate a first real-time RSSI value according to signal strength of data received by the first antenna and send the first real-time RSSI value to the register;

[0014] The second wireless module is configured to calculate a second real-time RSSI value according to the signal strength of the received data of the second antenna and send the second real-time RSSI value to the register.

[0015] In a possible implementation, the received data is sent by dual antennas of a slave node of the target battery pack.

[0016] In a possible implementation, switching the operating states of the first antenna and the second antenna in real time according to the first real-time RSSI value and the second real-time RSSI value specifically includes:

[0017] If the first real-time RSSI value is greater than a first preset threshold, keeping the first antenna in an active working state;

[0018] If the first real-time RSSI value is less than a first preset threshold, setting the second antenna to an active working state and setting the first antenna to a standby working state;

[0019] If the second real-time RSSI value is less than the second preset threshold and the working time of the second antenna is less than the preset communication threshold, report a communication failure;

[0020] If the second real-time RSSI value is less than a second preset threshold and the working time of the second antenna is greater than or equal to a preset communication threshold, the first antenna is set to an active working state and the second antenna is set to a standby working state.

[0021] In one possible implementation, the angle between the orientation of the first antenna and the orientation of the second antenna is a fixed value; the center point distance between the first antenna and the second antenna is set according to their respective signal-to-noise ratios and the edge distance of their respective main control boards.

[0022] In a possible implementation, the first antenna is a ceramic antenna, and the second antenna is a metal antenna.

[0023] In a possible implementation, a power supply module is further included, and the power supply module is used to convert the external power supply into the voltage required to power the internal components.

[0024] In a possible implementation, a relay control module is further included; after receiving an instruction from the control module, the relay control module changes the connection relationship between the first antenna and the second antenna and the control module.

[0025] In a possible implementation, the steering devices of the first antenna and the second antenna are connected, and when the orientation of one antenna changes, the orientation of the other antenna also changes accordingly.

[0026] In a possible implementation, the management and control module is a data processing unit or an integrated chip including management and control functions.

[0027] In a possible implementation, the first wireless module and the second wireless module are wireless communication data processing units or integrated chips including communication data processing functions.

[0028] In a possible implementation, the first real-time RSSI value refers to the signal strength currently transmitted by an external antenna of the architecture acquired by the first antenna.

[0029] In a possible implementation, the second real-time RSSI value refers to the signal strength currently transmitted by the external antenna of the architecture acquired by the second antenna.

[0030] In a possible implementation, the slave node dual antenna is a dual antenna structure made of different materials, and the orientations of the two antennas are adjusted according to the orientations of the first antenna and the second antenna.

[0031] In one possible implementation, the angle between the antenna orientation of the slave node dual antenna, which is made of the same material as the first antenna, and the antenna orientation of the first antenna does not exceed 30°; the angle between the antenna orientation of the slave node dual antenna, which is made of the same material as the second antenna, and the antenna orientation of the second antenna does not exceed 30°.

[0032] In a possible implementation, the first preset threshold and the second preset threshold are obtained after testing according to an actual application scenario.

[0033] In a possible implementation, the center point distance between the first antenna and the second antenna is set according to their respective signal-to-noise ratios and the edge distances of the main control boards on which they are located.

[0034] In a possible implementation, the power module supports multi-channel output.

[0035] An embodiment of the present application provides a wireless battery management architecture, which uses two wireless modules to respectively manage a first antenna and a second antenna made of different materials. The management and control module can indirectly control the working status of the first antenna and the second antenna by directly controlling the two wireless modules, and then judge the communication quality of the first antenna and the second antenna in combination with the first real-time RSSI value of the first antenna and the second real-time RSSI value of the second antenna transmitted in real time by the register, and then selectively switch the working status of the first antenna and the second antenna according to the communication quality (equivalent to replacing the external antenna), thereby avoiding conflicts between different antennas and ensuring the communication quality of the system's external antenna. In addition, the redundant structure of dual antennas made of different materials solves the problems of common negative interference and insufficient robustness. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic structural diagram of a wireless battery management architecture provided by an embodiment of the present application;

[0037] FIG2 is a flowchart of switching working states of a first antenna and a second antenna provided by an embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] Please refer to Figure 1. An embodiment of the present application provides a wireless battery management architecture, including: a management and control module 1, a first wireless module 2, a second wireless module 3, a first antenna 4, a second antenna 5 and a register 6; the first antenna 4 and the second antenna 5 are made of different materials.

[0040] The control module 1 is connected to the first wireless module 2 and the second wireless module 3 respectively; the first antenna 4 is connected to the first wireless module 2 as the communication module of the first wireless module 2, and the second antenna 5 is connected to the second wireless module 3 as the communication module of the second wireless module 3.

[0041] The register 6 is used to store a first real-time RSSI value of the first antenna 4 and a second real-time RSSI value of the second antenna 5 .

[0042] The control module 1 is configured to switch the working states of the first antenna 4 and the second antenna 5 in real time according to the first real-time RSSI value and the second real-time RSSI value.

[0043] The architecture provided by this embodiment can be applied to mobile communication equipment, complete vehicles, aviation, aerospace and other fields. The reason for using two antennas made of different materials as communication antennas is that the redundant structure formed by the two antennas can effectively solve the problem of insufficient robustness, and the difference in the two materials can avoid the common negative interference problem between two adjacent antennas; the second reason is that one of the two antennas can be switched to the external antenna in a timely manner according to the RSSI value, which can effectively ensure the quality of communication. When the main (first) antenna fails or is interfered with, that is, the communication RSSI value is lower than the set value, the backup (second) antenna will automatically switch to normal working state, thereby ensuring the continuity and reliability of radio communication.

[0044] It should be noted that the architecture in this embodiment does not mention the CAN (Controller Area Network) communication module. This is because the role played by the CAN communication module in this embodiment is the same as that of the wireless battery management architecture in the prior art, and will not be described in detail here. The CAN communication module is a well-known communication component, which is one or more controllers with a communication interface that can implement a communication protocol. If necessary, it can also include a memory and related interfaces, a system transmission bus, etc. The control module 1 in this embodiment generally uses a data processing unit or an integrated chip that includes a control function, and the first wireless module 2 and the second wireless module 3 generally use a wireless communication data processing unit or an integrated chip that includes a communication data processing function.

[0045] Exemplarily, the first wireless module 2 is configured to calculate a first real-time RSSI value according to the signal strength of the received data of the first antenna 4 and send the first real-time RSSI value to the register 6;

[0046] The second wireless module 3 is configured to calculate a second real-time RSSI value according to the signal strength of the data received by the second antenna 5 and send the second real-time RSSI value to the register 6 .

[0047] RSSI (Received Signal Strength Indication) is used to indicate wireless signal strength. As the English translation indicates, RSSI refers to the signal strength during wireless reception. It is related to the transmit power of the wireless module, the design of the RF front-end, and the gain of the antenna. The unit is power, generally expressed in dBm. The signal-to-noise ratio (SNR) is also calculated using RSSI, which is the ratio of signal power to noise power. Different wireless chip solutions display modules differently, and different wireless chip manufacturers generally have multiple RSSIs. Many wireless chips have two types of RSSI: received packet RSSI and environmental RSSI.

[0048] In this embodiment, the first real-time RSSI value and the second real-time RSSI value both refer to the RSSI value of the received packet. In other words, the first real-time RSSI value refers to the signal strength currently sent by other (outside the architecture) antennas obtained by the first antenna 4; the second real-time RSSI value refers to the signal strength currently sent by other (outside the architecture) antennas obtained by the second antenna 5.

[0049] Exemplarily, the received data is sent from the dual antennas of the slave node of the target battery pack.

[0050] The wireless battery management architecture provided in this embodiment can manage multiple groups of target battery packs at the same time, provided that each group of target battery packs is equipped with a slave node dual antenna. The slave node dual antenna here is a dual antenna structure with different materials, and the orientation of the two antennas needs to be adjusted according to the orientation of the first antenna 4 and the second antenna 5. Generally speaking, in order to ensure the communication quality and the accuracy of the real-time RSSI value, the angle between the orientation of the antenna of the slave node dual antenna with the same material as the first antenna 4 and the antenna orientation of the first antenna 4 cannot exceed 30° (can be adjusted appropriately), and the angle between the orientation of the antenna of the slave node dual antenna with the same material as the second antenna 5 and the antenna orientation of the second antenna 5 cannot exceed 30°.

[0051] Referring to FIG. 2 , illustratively, switching the working states of the first antenna 4 and the second antenna 5 in real time according to the first real-time RSSI value and the second real-time RSSI value specifically includes:

[0052] If the first real-time RSSI value is greater than or equal to the first preset threshold, keep the first antenna 5 in an active working state;

[0053] If the first real-time RSSI value is less than a first preset threshold, the second antenna 5 is set to an active working state, and the first antenna 4 is set to a standby working state;

[0054] If the second real-time RSSI value is less than the second preset threshold and the working time of the second antenna 5 is less than the preset communication threshold, report a communication failure;

[0055] If the second real-time RSSI value is less than the second preset threshold and the working time of the second antenna 5 is greater than or equal to the preset communication threshold, the first antenna 4 is set to the active working state and the second antenna 5 is set to the standby working state.

[0056] In this embodiment, the first and second preset thresholds are determined based on actual application scenarios and are related to the materials, placement, and operating environment of the first and second antennas 4 and 5. The first and second preset thresholds are used to limit the communication quality of the first and second antennas 4 and 5. When the communication quality of the first and second antennas 4 and 5 falls below the required level (i.e., the real-time RSSI value falls below the set value required for normal communication), a switch to the other antenna is immediately initiated to ensure continuity and reliability of radio communication.

[0057] Current environmental adaptability and EMC test result data show that ceramic antennas have stronger adaptability. Therefore, ceramic antennas are generally selected as the first antenna 4 .

[0058] Exemplarily, the angle value between the orientation of the first antenna 4 and the orientation of the second antenna 5 is a fixed value; the center point distance between the first antenna 4 and the second antenna 5 is set according to their respective signal-to-noise ratios and the edge distance of their respective main control boards 10.

[0059] In order to ensure that the angle between the orientation of the first antenna 4 and the orientation of the second antenna 5 is a fixed value, the steering devices of the two antennas can be connected, and when the orientation of one antenna changes, the orientation of the other antenna also changes accordingly.

[0060] Exemplarily, the first antenna 4 is a ceramic antenna, and the second antenna 5 is a metal antenna.

[0061] Exemplarily, a power supply module 7 is further included, and the power supply module 7 is used to convert the external power supply into the voltage required for powering the internal devices.

[0062] Generally speaking, a 12V DC external power supply can be used to power the BMS main control board 10. The power module needs to support multiple outputs.

[0063] Exemplarily, a relay control module 8 is further included; after receiving an instruction from the control module 1 , the relay control module 8 changes the connection relationship between the first antenna 4 and the second antenna 5 and the control module 1 .

[0064] In the embodiment of the present application, the power module 7 is a conventional power supply device, including a converter, an interface, a transmission line, a controller, a power storage device, etc. The relay control module 8 is one or more controllers with a communication interface capable of implementing a communication protocol, and may also include a memory and related interfaces, a system transmission bus, etc., if necessary; the controller executes program-related code to implement corresponding functions.

[0065] The embodiment of the present application provides a wireless battery management architecture that uses two wireless modules to respectively manage the first antenna 4 and the second antenna 5 made of different materials. The management and control module 1 can indirectly control the working status of the first antenna 4 and the second antenna 5 by directly controlling the two wireless modules, and then judge the communication quality of the first antenna 4 and the second antenna 5 in combination with the first real-time RSSI value of the first antenna 4 and the second real-time RSSI value of the second antenna 5 transmitted in real time by the register 6, and then selectively switch the working status of the first antenna 4 and the second antenna 5 according to the communication quality (equivalent to replacing the external antenna), thereby avoiding conflicts between different antennas and ensuring the communication quality of the system's external antenna. In addition, the redundant structure of dual antennas made of different materials solves the problems of common negative interference and insufficient robustness.

[0066] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A wireless battery management architecture, comprising a control module, a first wireless module, a second wireless module, a first antenna, a second antenna and a register; the first antenna and the second antenna are made of different materials; The control module is connected to the first wireless module and the second wireless module respectively; the first antenna is connected to the first wireless module as a communication module of the first wireless module, and the second antenna is connected to the second wireless module as a communication module of the second wireless module; The register is used to store a first real-time received signal strength indication (RSSI) value of the first antenna and a second real-time RSSI value of the second antenna; The management and control module is used to switch the working states of the first antenna and the second antenna in real time according to the first real-time RSSI value and the second real-time RSSI value.

2. The wireless battery management architecture as claimed in claim 1, wherein: The first wireless module is used to calculate a first real-time RSSI value according to the signal strength of the received data of the first antenna and send the first real-time RSSI value to the register; The second wireless module is used to calculate a second real-time RSSI value according to the signal strength of the received data of the second antenna and send the second real-time RSSI value to the register.

3. The wireless battery management architecture as claimed in claim 2, wherein: The received data is sent from the dual antennas of the slave node of the target battery pack.

4. The wireless battery management architecture as claimed in claim 1, wherein: The step of switching the working states of the first antenna and the second antenna in real time according to the first real-time RSSI value and the second real-time RSSI value specifically includes: If the first real-time RSSI value is greater than or equal to a first preset threshold, keeping the first antenna in an active working state; If the first real-time RSSI value is less than a first preset threshold, setting the second antenna to an active working state and setting the first antenna to a standby working state; If the second real-time RSSI value is less than the second preset threshold and the working time of the second antenna is less than the preset communication threshold, report a communication failure; If the second real-time RSSI value is less than the second preset threshold and the working time of the second antenna is greater than or equal to the preset communication threshold, the first antenna is set to an active working state and the second antenna is set to a standby working state.

5. The wireless battery management architecture as claimed in claim 1, wherein: An angle value between the orientation of the first antenna and the orientation of the second antenna is a fixed value.

6. The wireless battery management architecture as claimed in claim 1, wherein: The first antenna is a ceramic antenna, and the second antenna is a metal antenna.

7. The wireless battery management architecture as claimed in claim 1, wherein: It also includes a power supply module, which is used to convert external power into a voltage required for powering internal devices.

8. The wireless battery management architecture as claimed in claim 1, wherein: It also includes a relay control module; after receiving the instruction from the control module, the relay control module changes the connection relationship between the first antenna and the second antenna and the control module.

9. The wireless battery management architecture as claimed in claim 1, wherein: The steering devices of the first antenna and the second antenna are connected, and when the direction of one antenna changes, the direction of the other antenna also changes accordingly.

10. The wireless battery management architecture as claimed in claim 1, wherein: The control module is a data processing unit or an integrated chip including a control function.

11. The wireless battery management architecture as claimed in claim 1, wherein: The first wireless module and the second wireless module are wireless communication data processing units or integrated chips including communication data processing functions.

12. The wireless battery management architecture as claimed in claim 1, wherein: The first real-time RSSI value refers to the signal strength currently transmitted by the external antenna of the architecture acquired by the first antenna.

13. The wireless battery management architecture as claimed in claim 1, wherein: The second real-time RSSI value refers to the signal strength currently sent by the external antenna of the architecture acquired by the second antenna.

14. The wireless battery management architecture as claimed in claim 3, wherein: The slave node dual antenna is a dual antenna structure made of different materials, and the orientations of the two antennas are adjusted according to the orientations of the first antenna and the second antenna.

15. The wireless battery management architecture of claim 14, wherein: The angle between the antenna orientation of the slave node dual antenna that is made of the same material as the first antenna and the antenna orientation of the first antenna does not exceed 30°; the angle between the antenna orientation of the slave node dual antenna that is made of the same material as the second antenna and the antenna orientation of the second antenna does not exceed 30°.

16. The wireless battery management architecture as claimed in claim 4, wherein: The first preset threshold and the second preset threshold are obtained after testing according to actual application scenarios.

17. The wireless battery management architecture of claim 1, wherein: The center point distance between the first antenna and the second antenna is set according to their respective signal-to-noise ratios and edge distances of the main control boards where they are located.

18. The wireless battery management architecture as claimed in claim 7, wherein: The power module supports multi-channel output.

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